I've scanned around the FI section and can't find an answer. I had read before about TT cars recommending a 30 sec.-1 min. "cool down" idle after driving. Not sure about SC setups.

I have the new Stillen V3 SC kit on my '07; it's centrifugal style, self contained lube; no use of engine oil, etc. The owners manual doesn't say anything about a cool down. My question is do you guys recommend idling as to cool down the blower after driving?

 

Not needed, it's recommended on turbo cars due to the extreme heat turbos face from exhuast gases, to allow the fresh oil to cool the turbos at idle for a bit. A S/C never gets that hot in the first place.

 

+1 not needed really. The turbine of a turbo keeps spinning for a little while after you shut off the car which can be bad since oil is no longer being pumped to it. The extra idle keeps oil flowing to the turbo, helping to cool things down and provide lubrication while the turbine slows.

 

Thanks you two for the info. I assume that if cool down was an issue that Stillen would at least mention someting about it for their own SC kit.

 

I don't disagree with everyone above (that it's not absolutely necessary like it is with a turbo setup)…but when I had my procharger, not only did I give the car a ~1min warm up but I also let it idle for a minute or two in the garage. I would also lift the hood and take a quick peak at the engine bay while it was idle-ing down. the supercharger, even though not attached to the engine oil, still has ball-bearings and oil lubrication that would benefit from a cool down...

 

Warm-up is great for any car, engines are designed to run at operating temperatures, not cold, so the closer you get them to that before putting any real stress, the better. Cool-down on a blower is not going to lower the temp of it much at all. It might be 300 degrees, at most. Odds are the blower isn't even as hot as coolant temps.

A turbo is heated by the 13-1500 degree exhuast going though it, which is way above the breakdown temp of oil (appx 400 degrees, depends on the oil) . The point of a turbo timer is to allow that engine oil supplied at ~250 degrees to cool the center section of the turbo from any soaked exhaust heat until it reaches a reasonable enough temp to shut it down. If it's still hot it burns the oil in the turbo and results in premature wear to the bearings and seals.

 

If you are running the SC hard, I would never just shut it down.

At the Drag Strip, after a run, I idle back to the pits in 2nd, when parked let it idle for at least 2 min. more.

This pulls tons of heat out of the Motor and SC for the next run.

If you are just driving normal on the street, not in boost, then you are ok, but I still let mine idle for 30 sec or so, before shuting it down.

 

like everyone mentioned it's not needed since oil in a supercharger system isn't there to cool anything it's there to lubricate the gear box.

I laugh at people with turbo timers. It's a waste of money. Driving around in vac the turbo isn't heating up much so there is no reason to let it sit and idle for another minute or 2 after just cruising around. The only time it would be needed is if you pushing the car in boost and heating that turbo up then shutting the engine right down. I've never found a situation where I was getting into boost and then needed to instantly park my car. It takes a few minutes of normal driving to get anywhere and the turbo is cooling down at that time.

 

That plus modern ball bearing turbos with *proper* water cooling (e.g. not the APS-style plumbed in series setup) are not really succeptible to coking or boiling.

 

jeff laughs at me because i have a turbo timer =P although its purely convenience because i do have a habit of doing a run, parking and walking off to join the group of people i normally run with. 90% of the time i just turn it off when i get out of the car

 

I actually have one too but it's part of a viper 5901. Only engages if I push a button so 99% of the time it's not used unless I just got done hot lapping.

 

I laugh at you just to laugh at you

 

alot of people do lol especially the offroad guys at work because my car is so slow

 

It needs a lift kit to be cool.